US6719229B2 - Crusher - Google Patents

Crusher Download PDF

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Publication number
US6719229B2
US6719229B2 US10/364,313 US36431303A US6719229B2 US 6719229 B2 US6719229 B2 US 6719229B2 US 36431303 A US36431303 A US 36431303A US 6719229 B2 US6719229 B2 US 6719229B2
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US
United States
Prior art keywords
rotor
crushing
bed
dead
raw material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US10/364,313
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English (en)
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US20030183711A1 (en
Inventor
Shuichi Aihara
Yuichi Nagahara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kotobuki Engineering and Manufacturing Co Ltd
Original Assignee
Metso Minerals Matamata Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Metso Minerals Matamata Ltd filed Critical Metso Minerals Matamata Ltd
Assigned to METSO MINERALS (MATAMATA) LTD. reassignment METSO MINERALS (MATAMATA) LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AIHARA, SHUICHI, NAGAHARA, YUICHI
Publication of US20030183711A1 publication Critical patent/US20030183711A1/en
Application granted granted Critical
Publication of US6719229B2 publication Critical patent/US6719229B2/en
Assigned to KOTOBUKI ENGINEERING AND MANUFACTURING COMPANY LIMITED reassignment KOTOBUKI ENGINEERING AND MANUFACTURING COMPANY LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: METSO MINERALS (MATAMATA) LIMITED
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/14—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices
    • B02C13/18—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor
    • B02C13/1807—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate
    • B02C13/1835—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate by means of beater or impeller elements fixed in between an upper and lower rotor disc
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/14—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices
    • B02C13/18—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor
    • B02C13/1807—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate
    • B02C2013/1885—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate of dead bed type

Definitions

  • the present invention relates to crushers that use centrifugal force to crush mineral or other such raw materials.
  • Crushers which employ the centrifugal force generated by a cylindrical rotor rotating at high speed to eject the raw material to be crushed so that it collides with a dead-bed formed around the rotor and is finely crushed are already known.
  • crushers of the above-mentioned type have presented the following problems in relation to which improvements have been sought.
  • the present invention consists in a crusher comprising or including
  • a cylindrical rotor which rotates about a vertical axis, and a pulverising chamber which houses said rotor, which performs a pulverising process by ejecting raw material to be crushed from ejection ports of rotor so that it collides with a surrounding dead-bed, wherein crushing vanes are provided on an outer face of the rotor protruding radially therefrom, and said crushing vanes are formed with an extension located slightly below a raw material drop point of said dead-bed.
  • the crusher according to the present invention is provided with an annular wall inside said pulverising chamber, and located below the raw material drop point of said dead-bed.
  • the present invention consists in a crusher as described herein with reference to the accompanying figures.
  • FIG. 1 is a partial cross-section view of part of a crusher according to a first embodiment of the present invention.
  • FIG. 2 is a perspective view of a crushing vane.
  • FIG. 3 is a horizontal cross-sectional view of a crusher through line 3 — 3 in FIG. 1 for explaining an operation of the invention.
  • FIG. 4 is a vertical cross-sectional view of a crusher through line 4 — 4 in FIG. 1 for explaining an operation of the invention.
  • FIG. 5 is a flow diagram of the crushing process utilising the present invention.
  • FIG. 6 is a vertical section view of a crusher along line 4 — 4 of FIG. 1 according to a second embodiment of the present invention.
  • FIG. 7 is a vertical section view of a crusher according to a third embodiment of the present invention.
  • a substantially drum-shaped rotor 1 is accommodated at the centre of the crusher, and a pulverising chamber 2 is formed surrounding the rotor 1 .
  • the raw material to be pulverized that is ejected from the rotor 1 accumulates to form a dead-bed 4 that curves upwards from a lower plate 22 .
  • the lowest point of the curved dead-bed forms a raw material drop point A from which pulverized material falls.
  • the rotor 1 is formed in a drum shape, by axially aligned parallel opposing circular upper and lower plates 11 and 12 respectively, and a side-plate 13 which joins these at the circumference.
  • the rotor rotates about its vertical axis.
  • a feeder port 14 is opened into the centre of the upper plate 11 , so that the material to be crushed 7 can be fed continuously into the interior of the rotor 1 .
  • ejection ports 15 are formed in the side plate 13 , so that the material 7 can be ejected towards the pulverising chamber 2 .
  • a tip 6 with the edge thereof made from a hard material is installed so as to prevent the material 7 from damaging the ejection port 15 .
  • a plurality of crushing vanes 3 are fitted to the outer surface of the rotor so as to protrude radially therefrom.
  • the crushing vanes 3 each comprise a crushing member 31 and an attachment member 32 which together form an L-shaped integral element, with the internal angle of the L braced by ribs 33 (see FIG. 2 ).
  • the crushing member 31 has a length at least equal to that of the side plate 13 of the rotor 1 , and is furnished with a portion formed downward from the lower plate 12 serving as an extension 35 .
  • extension 35 is formed spanning a region below the raw material drop point A of the dead-bed 4 .
  • extension 35 is treated separately from the crushing member 31 , but in fact it is integral therewith.
  • a metal plate of ultra-hard metal is bonded by welding, an equivalent attachment or other processes known in the art process so as to create a hammer face 36 .
  • the crushing vanes 3 are shown bolted close to the ejection ports 15 .
  • the attachment position of the crushing vanes 3 is not limited to this, and provided they are on the outer face of the rotor 1 , they can be located away from the ejection ports 15 .
  • the attachment member 32 and the crushing member 31 of the crushing vane 3 are shown at right-angles to each other, other configurations such as an acute angle or an obtuse angle can be adopted, having regard to the balance between crushing effectiveness, wear and tear, and other factors, or, as an alternative to the L-shaped profile, the crushing vane may be formed as a rectangular body (or some other shape), of which one face forms the hammer face 36 .
  • the extent to which the crushing member 31 protrudes from the outer face of the rotor 1 , and the distance of extension below the lowest point A of the dead-bed 4 may also be varied.
  • the annular wall 5 is fitted along the inner rim of the opening of the lower plate 22 .
  • the annular wall 5 extends downwards below the lower plate 22 by substantially the same length as the extensions 35 of the crushing vane 3 positioned opposite thereto.
  • annular wall 5 is also located below the raw material drop point A of the dead-bed 4 .
  • the annular wall 5 is fitted continuously around the entire inner rim of the lower plate 22 , however it may be fitted intermittently.
  • annular wall 5 forms a space of fixed width between itself and the extensions 35 of the crushing vane 3 positioned opposite thereto.
  • the mineral or other material to be pulverised 7 which is introduced into the interior of the rotor 1 via the feeder port 14 , is ejected from the ejection ports 15 by the centrifugal force generated by the rotation of the rotor 1 .
  • the ejected material 7 collides with the dead-bed 4 and is pulverised.
  • Finely pulverised material 7 falls between the rotor 1 and the crushing chamber 2 , that is to say, as shown in FIG. 4, it falls through the gap between the annular wall 5 and the opposite extensions 35 of the crushing vanes 3 , while forming the stone curtain 71 .
  • the material to be pulverised 7 situated above the raw material drop point A, is broken up into fine particles by the pulverising effect of collision with the dead-bed 4 as mentioned before, and by the pulverising effect of striking the protruding crushing vanes 3 on the rotor 1 .
  • the material 7 that falls below the raw material drop point A as shown in FIG. 4 is struck and pulverized by the extensions 35 of the crushing vanes 3 , and some of the ricocheting material 7 , collides with the stone curtain 71 and is broken up even more finely.
  • the material 7 that passes through the stone curtain 71 without colliding therewith is broken up finely by collision with the annular wall 5 .
  • the formation of the stone curtain 71 during the crushing process reduces the amount of material 7 that collides with the annular wall 5 , with the effect that wear and tear on the annular wall 5 can be reduced.
  • the material 7 is graded by means of a screen 62 , and the material 7 of a size that exceeds a predetermined end product size is collected from the screen 62 and fed back into a crusher 60 .
  • the present invention can achieve a finer degree of pulverisation without adopting the method of increasing the speed of the rotor 1 . This is done as described above, by colliding the material 7 which falls below the crushing vanes 3 formed with the extensions 35 , against the stone curtain 71 , and even if this passes through the curtain, this is collided with the annular wall 5 formed extending downwards.
  • the present invention crushes more finely without increasing the speed at which the material 7 is ejected from the rotor 1 , there is little concern regarding adverse influence on the durability of the crusher 60 .
  • the first embodiment showed a case in which the extensions 35 that extend below the level of the rotor 1 are formed on the crushing members 31 of the crushing vanes 3 .
  • this is not the only possible configuration, and for example, as shown in FIG. 6, the entire rotor 1 may be lowered relative to the annular wall 5 .
  • the annular wall 5 may be formed such that the annular wall 5 side is raised relative to the rotor 1 .
  • the extensions 35 and the annular wall 5 are located below the raw material drop point A, so that the material 7 can be struck and crushed at a position below the raw material drop point A.
  • the annular wall 5 may also be omitted.
  • the present invention due to the above described form, achieves the following effects.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
  • General Preparation And Processing Of Foods (AREA)
US10/364,313 2000-08-11 2003-02-11 Crusher Expired - Fee Related US6719229B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2000-245047 2000-08-11
JP2000245047 2000-08-11
PCT/JP2001/006821 WO2002013971A1 (fr) 2000-08-11 2001-08-08 Broyeur

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2001/006821 Continuation WO2002013971A1 (fr) 2000-08-11 2001-08-08 Broyeur

Publications (2)

Publication Number Publication Date
US20030183711A1 US20030183711A1 (en) 2003-10-02
US6719229B2 true US6719229B2 (en) 2004-04-13

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ID=18735641

Family Applications (1)

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US10/364,313 Expired - Fee Related US6719229B2 (en) 2000-08-11 2003-02-11 Crusher

Country Status (9)

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US (1) US6719229B2 (xx)
EP (1) EP1382395B1 (xx)
JP (1) JP3668877B2 (xx)
AU (1) AU7771401A (xx)
BR (1) BR0113100A (xx)
CA (1) CA2417220C (xx)
NZ (1) NZ523667A (xx)
WO (1) WO2002013971A1 (xx)
ZA (1) ZA200300609B (xx)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110117824A1 (en) * 2009-11-16 2011-05-19 Loutzenheiser Mathew Lynn Vane, mounting assembly and throwing wheel apparatus having a locking member tapered in two planes

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2007105292A1 (ja) * 2006-03-13 2009-07-23 コトブキ技研工業株式会社 遠心破砕機
CN112847937B (zh) * 2021-02-25 2022-10-21 汕头市谷源新能源有限公司 一种废旧热固性塑料再生设备及再生工艺
CN116175826B (zh) * 2022-12-09 2024-10-22 松达智能科技(广东)有限公司 一种塑料模具回收装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6475049A (en) 1987-09-16 1989-03-20 Norihiko Oshima Pulverizing apparatus in crusher, ore grinder, grain regulator, etc.
US5058815A (en) * 1988-04-14 1991-10-22 Alberto Pozzato Hammer mill for crushing ore and the like materials
JPH0679189A (ja) 1992-08-31 1994-03-22 Nippon Cement Co Ltd 衝撃式竪型破砕機のロータ
JP2000153169A (ja) 1998-11-18 2000-06-06 Kotobuki Giken Kogyo Kk 遠心破砕機のロ−タ

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2992784A (en) * 1959-02-24 1961-07-18 Simplicity Eng Co Bowl liners for crushers
AT394501B (de) * 1986-10-30 1992-04-27 Wageneder Sbm Gmbh Auswechselbarer verschleissteil fuer den rotor einer prallmuehle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6475049A (en) 1987-09-16 1989-03-20 Norihiko Oshima Pulverizing apparatus in crusher, ore grinder, grain regulator, etc.
US5058815A (en) * 1988-04-14 1991-10-22 Alberto Pozzato Hammer mill for crushing ore and the like materials
JPH0679189A (ja) 1992-08-31 1994-03-22 Nippon Cement Co Ltd 衝撃式竪型破砕機のロータ
JP2000153169A (ja) 1998-11-18 2000-06-06 Kotobuki Giken Kogyo Kk 遠心破砕機のロ−タ

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110117824A1 (en) * 2009-11-16 2011-05-19 Loutzenheiser Mathew Lynn Vane, mounting assembly and throwing wheel apparatus having a locking member tapered in two planes
US8550881B2 (en) 2009-11-16 2013-10-08 Pangborn Corporation Vane, mounting assembly and throwing wheel apparatus having a locking member tapered in two planes

Also Published As

Publication number Publication date
CA2417220A1 (en) 2002-02-21
NZ523667A (en) 2005-06-24
EP1382395A4 (en) 2007-01-17
CA2417220C (en) 2008-10-07
AU7771401A (en) 2002-02-25
US20030183711A1 (en) 2003-10-02
BR0113100A (pt) 2003-06-24
ZA200300609B (en) 2004-01-21
WO2002013971A1 (fr) 2002-02-21
EP1382395A1 (en) 2004-01-21
JP3668877B2 (ja) 2005-07-06
EP1382395B1 (en) 2013-06-26

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AS Assignment

Owner name: METSO MINERALS (MATAMATA) LTD., NEW ZEALAND

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:AIHARA, SHUICHI;NAGAHARA, YUICHI;REEL/FRAME:014094/0736

Effective date: 20030131

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Effective date: 20160413